Tuesday, October 14, 2014

Sunol Valley: Getting Prepared


This week we acknowledge the 25th Anniversary of the Loma Prieta Earthquake. On October 17, 1989 at 5:04 p.m, the magnitude 6.9 Loma Prieta earthquake, also known as the “World Series Quake,” lasted 15 seconds causing an estimated $6-10 billion in property loss in the Bay Area. The anniversary is a reminder to all of us to make efforts to be prepared for the next major earthquake.

Here’s a quick snapshot of what’s been done in the Sunol Valley to better prepare us:

San Antonio Pump Station – Completed
The San Antonio Pump Station is one of the key facilities in the Sunol Valley which pumps Hetch Hetchy water through a transmission pipeline to the San Antonio Reservoir to the Sunol Valley Water Treatment Plant. It serves as a critical seismic upgrade project which provides a reliable water supply to our Bay Area customers after a major earthquake.


Sunol Valley Water Treatment Plant – Completed
If the Hetch Hetchy water supplies become unavailable for any reason, this plant enables us to supply the minimum demand of water to our customers, especially those in the East Bay and South Bay. The plant can now provide 160 million gallons of water per day for up to two months in case of an emergency. Previously, that level of service would run out after only a matter of days.

Alameda Siphon No. 4 – Completed
This project will ensure the water system performs properly, and water can be delivered to customers after an earthquake. The Alameda Siphon No. 4 Project extends approximately 3,000 feet from the Alameda East Portal across both the Calaveras Fault and Alameda Creek to the Alameda West Portal. It consists of a seismically-designed thicker-walled pipe in the fault rupture zone, and a tunnel crossing under Alameda Creek. 


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